gharbij ihn

30th November 2012, 20:23

15d. "Short break for the PM after promotion is most precious". (9). I have P-I-S-E-T,and the only word I can fit in is 'prissyest' . If this is right, what's the word play?
If we hadn't had visitors today I would have lashed out 20p to find out. As it is, I forgot.
Can anyone kindly explain - or correct me?